Improvement in guards for circular saws



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TO ALL WIIOM IT MAY CONCERN:

Be it known that I, J. W.- CLARK, of Iola, in the county of Allen, and State of Kansas, have invented a new and improved Guard for Circular Saws; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a vertical longitudinal section of my improved circular-saw guard, taken in the plane of the line z a', fig. 4, showing it when the saw is not at work.

Figure 2 is a side elevation view, taken when the saw is at work and the guard is vraised for the lumber to pass.

Figure 3 is a plan.

Figure 4 is a transverse vertical section, taken in the plane of the line y y, fig. 1.

Similar letters of reference indicate like parts. i

The design of this invention is to provide a selfadj usting guard for eireular saws for preventing all possibility of accidents, while in no way interfering with the operation of the saw or the handling of the lumber in passing it to or taking it from the saw, and at the same time abating the flying saw-dust by conducting it under the saw-table.

This improvement consists in a cover for the saw pivoted to a hinged frame, and arranged in such manner as to rise when the lumber passes to the saw, by means of a self-adjusting drop in front, which falls `just as the last en d is about coming to the saw, and thus prevents the hand from following too far, and coming in eontaet with the saw. The guard may be made of metal or wood, and adapted to saws of all sizes.

A represents the saw-table, and C the circular saw. B is'the box. or cap-guard placed over the saw, which guard is suspended or pivoted to the end of an arm, a, ou the frame D, which is hinged or jointed at one side to a standard, E, so that it can rise and fall with the guard B. The rear end of the guard-cap B is {itted to slide up and down in a guide-arm, 11, projecting from the vibrating frame D. On the front end of the eapguard B is a self-adjusting drop, c, which is formed with an inclined face on the under side, as shown in figs. l 2. The foot or lower end of the drop c is shouldered to ii't under the end of the guard B, and lift it when the drop rises te allow the lumber to pass under it to the saw, butfalls of itself independently of the guard by means of the sliding guide-bar di A pin, e, in the bar d, holds the drop in place when the Asaw is not at work, and may be transferred to one of a series of holes, L h, in the rear end of the guard B, to regulate its elevation when the saw is at work. On the arm a is a guide-brace, lc, the end of which works in a slide, m, on the side of the guard-cap B.

The operation is manifest. When the endof the lumber to be sawed is pressed against the drop c, it will rise and lift the guard B to allow the stock to pass under to the saw, and finally the whole guard, which adjusts itself on its pivot-arm a, will rest on the upper surface of the stockparallel with the saw-table A as the stoel( passes on over the saws, as shown in g. 2, the stock being indicated in red lines. As the end passes from under the drop c it will fall of itself, and prevent the hand from coming in Contact with the saw when the steek is not followed by another piece. The saw-dust will be conducted by the cap B down under the table. When the guard is not needed it may be thrown back with the frame D out of the way.

Having described my invention, what I elaim as new, and desire to secure by Letters Patent, lis- The saw-guard B, provided-with the self-adjusting drop c, and suspended on the vibrating frame D, eonstructed and operating substantially as and for the purposes herein described.

J. W. CLARK. Witnesses:

D. R. Hover, Cuantas P. Twiss. 

